(7+i)(6-9i)=0

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Solution for (7+i)(6-9i)=0 equation:


Simplifying
(7 + i)(6 + -9i) = 0

Multiply (7 + i) * (6 + -9i)
(7(6 + -9i) + i(6 + -9i)) = 0
((6 * 7 + -9i * 7) + i(6 + -9i)) = 0
((42 + -63i) + i(6 + -9i)) = 0
(42 + -63i + (6 * i + -9i * i)) = 0
(42 + -63i + (6i + -9i2)) = 0

Combine like terms: -63i + 6i = -57i
(42 + -57i + -9i2) = 0

Solving
42 + -57i + -9i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '3'.
3(14 + -19i + -3i2) = 0

Factor a trinomial.
3((2 + -3i)(7 + i)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(2 + -3i)' equal to zero and attempt to solve: Simplifying 2 + -3i = 0 Solving 2 + -3i = 0 Move all terms containing i to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -3i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -3i = 0 + -2 -3i = 0 + -2 Combine like terms: 0 + -2 = -2 -3i = -2 Divide each side by '-3'. i = 0.6666666667 Simplifying i = 0.6666666667

Subproblem 2

Set the factor '(7 + i)' equal to zero and attempt to solve: Simplifying 7 + i = 0 Solving 7 + i = 0 Move all terms containing i to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + i = 0 + -7 Combine like terms: 7 + -7 = 0 0 + i = 0 + -7 i = 0 + -7 Combine like terms: 0 + -7 = -7 i = -7 Simplifying i = -7

Solution

i = {0.6666666667, -7}

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